Tire flat spots

Your not giving much info to get good advice. How old are the tires? What surface have they been sitting on for 2 yrs? Are they bias, or radial? All tires will dry rot, but radial tires are less likely to flat spot. I'd find the bottom spot, look between the tread for any cracks, or signs of rot. If they are only 2 yrs old, parked on a solid surface, no standing water, they should be okay. If more than 5 yrs old, parked on the dirt, they need to be replaced.

Jerry

Flat spots will work themselves out but mice and other rodents could be a concern, just sitting.